Storm Scaling

Storm Scaling

https://blueprints.launchpad.net/sahara/+spec/storm-scaling

This blueprint aims to implement Scaling for Storm.

Problem description

Storm plugin in sahara doesn’t have the scaling option implemented yet. This feature is one of the major attractions to building cluster using sahara.

Proposed change

The implementation of the scaling feature following the implementation from Spark plugin.

The implementation will allow users to:

  • Scale up a cluster
  • Scale down a cluster

Storm is a fairly easy tool to scale. Since it uses Zookeeper as a configuration manager and central point of communication, a new node just needs to configure itself to communicate with the Zookeeper machine and the master node will find the new node. One important point that needs to be taken in consideration is the Storm rebalance action. Once a new node is added, a running topology will not be rescheduled to use the new instance. We are going to call this rebalance action automatically so the user won’t have to worry about this call.

Alternatives

None.

Data model impact

None.

REST API impact

None.

Other end user impact

None.

Deployer impact

None.

Developer impact

None.

Sahara-image-elements impact

None.

Sahara-dashboard / Horizon impact

None.

Implementation

Assignee(s)

Primary assignee:
tellesmvn

Other contributors:

Work Items

  • Implement Storm Scaling feature
  • Implement topology rebalance

Dependencies

None.

Testing

Follow examples on scaling tests from other plugins to implement unit tests for Storm scaling.

Documentation Impact

None.

References

None.

Creative Commons Attribution 3.0 License

Except where otherwise noted, this document is licensed under Creative Commons Attribution 3.0 License. See all OpenStack Legal Documents.

sahara-specs 0.0.1.dev337